added ping operation using job_request() function.  If it receives a RSL description of zero length then it assumes a gatekeeper ping is desired.
added ping operation using job_request() function.  If it receives a RSL
description of zero length then it assumes a gatekeeper ping is desired.

ellert/globus-toolkit,gridcf/gct,globus/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,gridcf/gct,ellert/globus-toolkit,gridcf/gct,gridcf/gct,globus/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,gridcf/gct,ellert/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,gridcf/gct,ellert/globus-toolkit